B2 6.1 The origins of life on Earth

  • Created by: jkav
  • Created on: 26-04-14 15:39
  • It is believed that the Earth is about 4500 million years old and that life began about 3500 years ago.
  • There is some debate as to whether the first life developed due to the conditions on Earth, or whether simple life forms arrived from another planet.
  • We can date rocks. Fossils are found in rocks, so we can date when different organisms existed.
  • Fossils may be formed in various ways:
    • from hard parts of…


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